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科学通报  2012 

RegCM3对21世纪中国区域气候变化的高分辨率模拟

DOI: 10.1360/csb2012-57-5-374, PP. 374-381

Keywords: 气候变化,区域气候模式,中国区域,数值模拟,不确定性

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Abstract:

使用RegCM3区域气候模式,单向嵌套日本CCSR/NIES/FRCGC的MIROC3.2_hires全球模式输出结果,对中国及东亚地区进行了1951~2100年,在IPCCSRESA1B温室气体排放情景下,水平分辨率为25km的连续气候变化模拟试验.首先分析了区域模式对当代气候的模拟能力,结果表明,模式可较好地再现中国地区地面气温和降水的空间分布及数值.对未来21世纪中期和末期气候变化的模拟表明,未来平均气温将明显升高,且随时间推移,气温升高幅度增大,升温高值区集中在高纬度和高海拔(青藏高原)地区.21世纪中期,冬季降水除青藏高原外以增加为主,夏季降水在中国西部西北地区增加、青藏高原减少;东部地区降水变化呈正负相间的分布.21世纪末期,降水变化分布除个别地方外,和21世纪中期一致,但变化幅度增大.此外,将此模拟结果与以往RegCM3在另一个全球模式驱动下的结果进行了对比,以了解中国地区气候变化预估中的不确定性.

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